h1 {
  color: #fff;
}
#box1 {
  display: flex;
  backface-visibility: hidden;
  width: 100px;
  height: 100px;
  background-image: url("../images/1.jpg");
  background-repeat: no-repeat;
  background-size: 100% 100%;
}
#box2 {
  width: 100px;
  height: 100px;
  background-image: url("../images/2.png");
  background-repeat: no-repeat;
  background-size: 100% 100%;
}
#box3 {
  width: 100px;
  height: 100px;
  background-image: url("../images/3.png");
  background-repeat: no-repeat;
  background-size: 100% 100%;
}
